Tractor



A. G. cRlBAm TRACYOR. AEPLlCA-TION FILED 1UNE IG, 1920.

PatentedSept. 27, 1921.

2 SHEETS-SHEET FIGURE 2 FIGURE 4 INVENTOR ATTORNEY A. G. CRIBARI.

TRACTOR.

APPLIC'ATION FILED JUNE 16, 1920.

1,391,761. PatentedSept. 27, 1921. w I. I 2 SHEETS-$HEET 2.

43 "0 YET. i D. 10 z 1 a J 1 17 (5/12/11 4 @jjiij 1- magma ATTORNEYated.

and provided with tending flange 12 to. which is'bolt ed gear 13.['Afspur gear, leis shown mountederate d or independently oper drivingnie'clianis m partly in section.

mg mechanism. -Referring more ngfl indicates a .ANGELO. G; GRIBARI} SANEmit, "ALIFORNIA.

T0 (ZZZ whom itmay concern: Be it knownthat .I,'ANenLoG. C IBARnacitizenof the United States, andre's'iden't of an Bruno, in the countyof San Mateofand State of California, I new and useful Improvements inTractors,

of. Which the following is a specification.

Iy invention relates to afnewand novel form of tractor in which eitherdrive wheel may operate independently of the other f Itis'the object ofmy invention to provide a tractor of thecharacter indicated in which thedrive wheels may be simnltaneously'opdriver may require; in which thedrive wheels may be operated as indicated in conjunction wit a singlesteering'wheel; and in which the mechanism provided for se'cui ing thedesired results is simple in form, of

few parts, and easily assembled and oper- In the drawing Figure 1 is abodying my invention, partly in "section j 1 Fig. 2 is a section on ofFig. 1. Fig; 3 'is an enlarged plan view of the Fig. 4 is asection;on44t of Fig. 1.,

Fig. 5 is an enlarged detail view of the brake band operatingmechanisinl v j Fig. 6 is an enlarged detail view of the means foroperating the brake band operatparticularly to' the drawsteering wheel 2mounted on the tion thereof controlled byhandle 3 and gear connection 4.-At

5 is shown a shaft revolu- .bly' mounted in bearings 6 in' f aine l, and

carrying a central sleeve 'Zfkejyed thereto i a pair of frictionfwheels8 and 9 fitted withbrake bands 10 and 10 respectively;

ened at 11 and carrying anoutwardlyeiza spur on'.-sliaft l5linbearingslG and in permanent have invented certain ated as the v 'boltedthereto. I 2425 at itsinner end and extending in terminating in .mountedon planview of a tractor em 7 a link which in turn is nected' to arm.revolubly mounted'in bearing suitable frame .havingsfa front porfof d10 on."

r i k ,y 'Likewise thesliding Wheel 8 isprovidedj with a flange wid-TRAC R.

i specmaaonjof Latte Patent. I "Patented sept. 127, 1921. a ucati nflfieaiune.re, ieao. 'sriai no. 389,419} J "bevel gear 17in permanent meshwith a pinion 18 operated by'tdrivin'g shaft l9,.the motor at2 f ictionwheels 8 and Qjaredrivensimulta- 'eouslyat equal speeds in thesame'direction. Since the mechanisms operated by the 9 are identical inconstruc- .tion and operation but one will be described in detail andthe other designated by similar numerals followed by an appropriateletter. Revolubly mounted onashaft 5' adjoining central sleeve 7 is asleeve 21 carrying wheel 22 throughthe medium of flanged collar23 LSleeve 21' carries arms for operating the samebeing indicated j It is'clear that in this constru ctionithe opposite directions iadjacent wheel8 and heads '26 27. Slidably sleeve'211is'a collar' 28revolving'therewith through the medium of key Collar 28*carries'fan arm30 pivoted thereto at 3'1 and pivoted at itsupper end to pivotally con-33 of crank 34; the latter being 35 in head 26. Crank 34L carriesa diskits axis, the" disk being provided with jpins" 37%38-011 its? outersurface, and each pin having a rod 'a's '89 t0 pivotally "connectedthereto as shown,these rods 39-'40 be taken up.

36 at right angles to i By neans'of this .niec'hani smtthe revolving isk36 in one direction will tighten band wheel 8 and revolving the samefin-the opposite direction will. loosen the (band. of colla'r 28inwardly will, through the medium of parts 30 32 33 -84C revolve thedisk 36 inithe direction indicated "by the arrow to tighten on wheel 8,and sliding collar "28' outwardly will have the opposite effect.

band 10 v lines and the collar driving wheels 22- 2- ling positioned asshown in dotted lines, is of course obvious To slide collar 28 I providean arm 4:7 pivoted to frame 1 at 48 and to collar 2-8 at 19, pin 49being set in collar 4:9 positioned in groove 49 in collar 28, Secured tothe outer end of arm 17 is a laterally extending arm 50 to which ispivotally connected at 51 a link 52. A second link 53 is piv'otallyconnected to frame 1 at 5A and to link 52 at 55. A third link 56 ispivotally connected to links 52 and 58 'at:v55atf-'on'e end and theother end being pivotally connected to lever 57 pivotally mounted onframe 1 at 58. By'

throwing lever 57 backwardly the collar 28 is moved inwardly "to securethe result de scribed and by throwing the lever 57 forwardly the partsmoved into the positions indicated in dotted 28 is caused to slideoutwardly whereby the band 10 is loosened. on wheel 8 as described. H Iv The arm 25 is provided with a sliding .joint at 54 whereby to permitthe sliding of collar 28, the head 27 i being connectedto band 10 as at60 to prevent slipping of the same on wheel 8. 7

hen the motor is in operation the central sleeve 7 and the frictionwheels 8 and 9 are positively driven by driving shaft 18 and garconnections 13-14-1718 thereto.

0th levers 57- 57 being thrown forwardly no movement is imparted todrive wheels 22?-22*. For. ordinary operation of the tractor bothlevers57 -57 a are thrown back thereby tightening bothbands 1010 on theirrespective wheels 8 and 9 thereby through the connections between bands10 and 10 andsleeves 21-21 simultaneously at the same rate of speed. inthe same direction.

The usual steering of the tractor along substantially straight l nes orin wide circles iseffected in the usual way by steering wheel 2; But ifit is desired to make a short turn to the left, for instance, as aroundthe end of a row of trees, then the lever 57 is-thrown forwardly .torelease band 10 on wheel 8 so that no power is'transmitt-ed to wheel 22.but the full amount of power is transmitted to wheel 22 causing the sameto travel around wheel 22 asa pivot, the steering wheel 2 bei thateither drivewheel may thus be thrown into or out of operation at thewill of the driver, or any desired amount of powermay be applied toeither drive wheel to effect the desired turn, the

steering wheel 2 beingmampulated accordingly. I I

This construction provides a positive means of effecting the desiredresult and is extremely simple in construction and operation, the onlygearing required being pinion 18 and the three gears 13-14i17 in easilyaccessible positions.

therewith, a each end of said bearing shaft,adrive wheel brake Atherewith, a sleeve changes in form, construction and method ofoperation may be made within the scope of the appended claims.

I claim:

1. A tractor including a frame, a bearing shaft mounted thereon, arevoluble double friction wheel centrally mountedon said shaft, meansfor actuating the same, a'sleeve revolubly mounted on each end of saidshaft, a drivewheel mounted" on each sleeve, a pair of brake bandsmounted on said friction Wheel, a supporting arm mounted on each"revoluble sleeve to revolve therewith and extending outwardly to apoint adjacent the ends of said brake bands,

and means operatively mounted on "each arm and slidably mounted on saidrevoluble sleeves to revolve therewithfor operating said brake bands,independently of each other, I y a s,

2. A tractor including a frame a bearing shaft mounted to revolvethereon, a sleeve centrally mounted on said shaft to revolve therewith,a pair of spacedparallel friction wheels mounted on said sleeve torevolve sleeve 7 revolubly mounted on fixedly mounted on each revolublesleeve, a band mounted on each friction wheel, a supporting arm mountedon each revoluble sleeve to revolve therewith and extending outwardly toa point adjacent the ends of said brake bands, means operatively mountedon each arm and slidably mounted onsaid revoluble sleeves to revolvetherewith for operating said brake bands, and means for actuating bothof said same direction. 7

3. A tractor including aframe, a bearing shaft mounted to revolvethereon, a sleeve centrally mounted on said shaft to revolvetherewith,-a pair of spacedparallel friction wheels mounted on'revolubly mounted on each end of said bearing shaft, a 'drive wheelfixedly mounted on each revoluble sleeve, a brake band mounted oneachfriction wheel,

, a supporting arm mounted on each revoluble sleeve, to revolvetherewith and extending outwardly to a point adjacent the ends of saidbrake bands, means mountedin each varm tooperate said brake hands, alaterally extendingarm carried by each of said last mentioned means, alink attached to each arm, a second arm ivotally connected to each link,a sleeve sli ably mounted on each revolvingfsleeve to revolve therewith,a pivotal connection between each sleeve and said second arm, means foroperating each slidable sleeve on its respective revolving sleeve, andmeans for actuating both of said friction wheels in the same direction.

4. A tractor including a frame,

a bearing shaft mounted to revolv e thereon, a sleeve centrallymountedon said shaft to revolve It is to be understood, of course,thattherewith, a'pair of spaced parallel friction 10o -frict1on wheelsin the V said sleeve to revolve 'means slidably mounted on each Wheelsmounted on said I sleeve to revolve therewith, a sleeve revolublymounted on each end of said bearing shaft, a drive Wheel fixedly mountedon each revolublef sleeve, a brake band mounted on-each friction Wheel,revolubly mounted sleeve to revolve therewith for operating said brakebands, an arm pivotally mounted on the tractor frame and pivotallyconnected to each slidable means, a link piv- 10 motion between saidlinks, and means for 15 actuating both of said friction Wheels in thesame direction.

ANGELO G. GRIBARI.

